Fast Ethernet Train Backbone Node 

Train Backbone Node


FE Train Backbone Node

  • Compliant with IEC 61375 standard
  • Compliant with IEC 61375-2-3 standard
  • 4x FE switched ports for ETB implementation
  • 1x FE port to be connected to ECN
  • 2x Device hardware bypasses
  • R-NAT (Railway 1:1 NAT)
  • Router Redundancy Protocol
  • Dynamic routing following train inauguration
  • TTDP protocol
  • Full communication profile
  • TRDP protocol
  • Compliant with EN 50155 standard
  • Compliant with EN 45545 standard
  • Extended temperature range -40 °C ÷ +85 °C available

VDS Rail's Fast Ethernet Train Backbone Node (ETBN) is used when two or more trains need to be connected together. The Train Backbone Node has been specially designed to meet the requirements specified by IEC 61375 for the Ethernet Train Backbone (ETB) network.

Double switched backbone lines protected by a bypass relay ensure high levels of fault tolerance also in the case of a power failure. One or more ETBNs can be used together with an active/passive redundant configuration to obtain the maximum level of protection.

Designed to operate in harsh environmental conditions typical of Rolling-Stock applications and fully EN 50155 compliant, the ETBN provides the highest level of reliability and robustness required by the railway industry.

The TTCMP provides automatic device configuration and continuous monitoring giving the customer a way to reduce commissioning and maintenance costs.

Wide range of models available

The Train Backbone Node has four (4) 100BASE-TX switched ports for Train Backbone Network implementation and one (1) 100BASE-TX port to be connected to the Consist Network.

IEC 61375 compliance

IEC 61375 Train inauguration procedure is fully supported as well as ETBN control interface for TRDP devices. Routing and address translation rules for multiple consist networks interconnections are automatically defined during train inauguration. Other interfaces (SNMP, REST) are also available in order to provide a wider range of potential implementations.

Main technical specifications

  • IEEE 802.3 Standard Physical layer: 10BASE-T, 100BASE-TX
  • IPv4 protocol supported (IPv6 protocol ready)
  • Spanning tree (STP 802.1D) and Rapid Spanning Tree (RSTP 802.1w)
  • Link aggregation protocol (LACP 802.3ad)
  • Up to 4096 802.1Q VLANs
  • DHCP option 82 handling
  • IGMP versions 1, 2 and 3 snooping
  • SNMP v1, v2c, v3 device management
  • Static IPv4 unicast and multicast routing
  • OSPF and RIP dynamic routing protocols
  • Network Address Translation (SNAT, DNAT and R-NAT)
  • Packets filtering
  • Router Redundancy Protocol
  • Dynamic routing following train inauguration
  • Train-wide standard multicast routing  

Physical data

  • Connector type: M12
  • Power supply: 24 Vdc ÷ 110 Vdc
  • Interruption voltage supply class: S2, according to EN 50155
  • Power consumption: 22 W max
  • Overall dimensions: 207 x 184 x 51 mm
  • Weight: 2.0 Kg
  • Operating temperature: -25 °C ÷ +70 °C (+85°C for 10 min. according to EN 50155 class OT3 with extended operating temperature ST1) or -40 °C ÷ +70 °C (+85°C for 10 min. according to EN 50155 class OT4 with extended operating temperature ST1)
  • Storage temperature: -40 °C ÷ +85 °C
  • Degree of protection: IP40, IP54, IP65

Main approvals/compliance

  • EN 50155: Railway Applications (Electronic equipement used on rolling stock)
  • IEC 61375: Electronic railway equipment - Train communication network (TCN)
  • EN 61373: Shock & Vibration
  • EN 45545: Fire & Smoke
  • IEEE 802.3: Ethernet Network Standard 
  • REACH Regulation and Waste Framework Directive (WFD)
  • RoHS Directive